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Savory Caramelized Onion and Mushroom Crostini

Savory Caramelized Onion and Mushroom Crostini

  • Author: Alyssa

Description

Savor the perfect appetizer with caramelized onion and mushroom crostini—crispy bread topped with sweet onions, savory mushrooms, and fresh herbs.

Ingredients

Scale
  • 1 baguette (sliced into 1/2-inch rounds)
  • 3 tablespoons olive oil (divided)
  • 1 clove garlic (halved)
  • 2 large onions (thinly sliced)
  • 2 tablespoons unsalted butter
  • 8 ounces cremini or button mushrooms (thinly sliced)
  • 2 teaspoons fresh thyme leaves (or 1 teaspoon dried thyme)
  • 1 tablespoon balsamic vinegar
  • Salt and black pepper (to taste)
  • Optional Garnishes:
    • 1/4 cup crumbled goat cheese or grated Parmesan
    • Fresh parsley or chives, chopped

Instructions

  1. Prepare the Baguette: Preheat your oven to 375°F (190°C). Arrange the sliced baguette on a baking sheet. Brush each slice generously with 3 tablespoons of olive oil. Bake for 8–10 minutes until the bread is golden and crisp. Once done, remove from the oven and rub the warm bread with the halved 1 clove of garlic to infuse its flavor.
  2. Caramelize the Onions: In a large skillet, melt 2 tablespoons of unsalted butter with 1 tablespoon of olive oil over medium heat. Add the 2 large thinly sliced onions along with a pinch of salt. Cook for about 20–25 minutes, stirring occasionally, until the onions become soft and golden brown. Towards the end of cooking, drizzle in 1 tablespoon of balsamic vinegar to enhance sweetness.
  3. Sauté the Mushrooms: In the same skillet, add the remaining 2 tablespoons of olive oil if needed. Add 8 ounces of thinly sliced cremini or button mushrooms along with 2 teaspoons of fresh thyme leaves, a pinch of salt, and black pepper to taste. Cook for 8–10 minutes, stirring frequently, until the mushrooms are tender and golden.
  4. Assemble the Crostini: On each baguette slice, generously spoon a combination of the caramelized onions and sautéed mushrooms. If desired, sprinkle with 1/4 cup of crumbled goat cheese or grated Parmesan to add creaminess and richness.
  5. Garnish and Serve: Finish off your crostini by scattering some chopped fresh parsley or chives on top for a vibrant color. The crostini can be served warm or at room temperature, making them perfect for any gathering.

Find it online: https://recipecastle.com/savory-caramelized-onion-and-mushroom-crostini/